Last night, I retuned a C Marine Band harmonica using A=432Hz as the reference. Below is an audio file comparing that harmonica to another C Marine Band harmonica tuned with A=440. I recorded it on my Sony PCMM10; it's a continuous .wav file and no EQ was applied afterwards, just light compression on the entire file to help highlight any differences between the two. I tried to play the same riffs the same way each time, but this is far from scientific. The 440Hz harmonica is first.

Tell me, what are your impressions?

UPDATE, 04/10/2014:

﻿I am happy to announce that I can provide Hohner Marine Band Deluxe and Special 20 harmonicas re-tuned for use with A=432 instruments. For rates, please email me at glhundt_at_yahoo.com or use the contact form! ﻿